set __FLT_EVAL_METHOD__=0 on osx

conda-forge · Jul 19, 2024 · e09527a · e09527a
1 parent 65a4cf3
commit e09527a
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/recipe/build.sh b/recipe/build.sh
@@ -140,6 +140,13 @@ if [[ "$host_platform" == osx* ]]; then
     export CFLAGS="$CFLAGS -isysroot $CONDA_BUILD_SYSROOT $NO_WARN_CFLAGS"
     export CXXFLAGS="$CXXFLAGS -isysroot $CONDA_BUILD_SYSROOT $NO_WARN_CFLAGS"
     export CPPFLAGS="$CPPFLAGS -isysroot $CONDA_BUILD_SYSROOT $NO_WARN_CFLAGS"
+
+    # GCC doesn't seem to set this anymore, but the macOS SDK expects a value, see
+    # https://github.com/alexey-lysiuk/macos-sdk/blob/main/MacOSX13.3.sdk/usr/include/math.h#L39-L54
+    # Not obvious how -fpermitted-flt-eval-methods would fix this
+    # https://github.com/gcc-mirror/gcc/blob/releases/gcc-12.3.0/gcc/c-family/c-cppbuiltin.cc#L1209-L1224
+    # https://gcc.gnu.org/onlinedocs/gcc/C-Dialect-Options.html#index-fpermitted-flt-eval-methods
+    export __FLT_EVAL_METHOD__=0
 fi
 
 if [[ "$build_platform" == "$host_platform" ]]; then